Objective To explore the mechanism of neuroprotective effect of Sijunzi Decoction on cerebral cortex in focal cerebral ischemia-reperfusion(FCIR) rats. Methods 48 male Sprague Dawley(SD) rats were randomly divided into control group, model group, nimodipine group and Sijunzi Decoction group, with 12 rats in each group. The FCIR rat models were established by middle cerebral artery occlusion. The control and model groups were treated with normal saline for 14 d,while nimodipine and Sijunzi Decoction groups were treated with nimodipine(10.80 mg/kg) and Sijunzi Decoction(6 g/kg) for14 d, respecti...